<?php

/**
 * GoogleOAuthService class file.
 *
 * Register application: https://code.google.com/apis/console/
 *
 * @author Maxim Zemskov <nodge@yandex.ru>
 * @link http://github.com/Nodge/yii-eauth/
 * @license http://www.opensource.org/licenses/bsd-license.php
 */
require_once dirname(dirname(__FILE__)) . '/EOAuth2Service.php';

/**
 * Google provider class.
 *
 * @package application.extensions.eauth.services
 */
class GoogleOAuthService extends EOAuth2Service {

    protected $name = 'google_oauth';
    protected $title = 'Google';
    protected $type = 'OAuth';
    protected $jsArguments = array('popup' => array('width' => 500, 'height' => 450));
    protected $client_id = '';
    protected $client_secret = '';
    //protected $scope = 'https://www.googleapis.com/auth/userinfo.profile';
    protected $scope = 'https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/userinfo.email';
    protected $providerOptions = array(
        'authorize' => 'https://accounts.google.com/o/oauth2/auth',
        'access_token' => 'https://accounts.google.com/o/oauth2/token',
    );

    protected function fetchAttributes() {

        $info = (array) $this->makeSignedRequest('https://www.googleapis.com/oauth2/v1/userinfo');

        $this->attributes['id'] = $info['id'];
        $this->attributes['name'] = $info['name'];

        if (!empty($info['link'])) {
            $this->attributes['url'] = $info['link'];
        }

        if (!empty($info['gender']))
            $this->attributes['gender'] = $info['gender'] == 'male' ? 'M' : 'F';

        if (!empty($info['picture']))
            $this->attributes['photo'] = $info['picture'];

        if ($info['verified_email'] && !empty($info['email'])) {
            $this->attributes['email'] = $info['email'];
        }

        $this->attributes['first_name'] = $info['given_name']; // first name
        $this->attributes['last_name'] = $info['family_name']; // last name
        $this->attributes['birth_day'] = $info['birthday']; // format: 0000-00-00
        $this->attributes['locale'] = $info['locale']; // format: en
    }

    protected function getCodeUrl($redirect_uri) {
        $this->setState('redirect_uri', $redirect_uri);
        $url = parent::getCodeUrl($redirect_uri);
        if (isset($_GET['js'])) {
            $url .= '&display=popup';
        }
        return $url;
    }

    protected function getTokenUrl($code) {
        return $this->providerOptions['access_token'];
    }

    protected function getAccessToken($code) {
        $params = array(
            'client_id' => $this->client_id,
            'client_secret' => $this->client_secret,
            'grant_type' => 'authorization_code',
            'code' => $code,
            'redirect_uri' => $this->getState('redirect_uri'),
        );
        return $this->makeRequest($this->getTokenUrl($code), array('data' => $params));
    }

    /**
     * Save access token to the session.
     *
     * @param stdClass $token access token array.
     */
    protected function saveAccessToken($token) {
        $this->setState('auth_token', $token->access_token);
        $this->setState('expires', time() + $token->expires_in - 60);
        $this->access_token = $token->access_token;
    }

    /**
     * Makes the curl request to the url.
     *
     * @param string $url url to request.
     * @param array $options HTTP request options. Keys: query, data, referer.
     * @param boolean $parseJson Whether to parse response in json format.
     * @return string the response.
     */
    protected function makeRequest($url, $options = array(), $parseJson = true) {
        $options['query']['alt'] = 'json';
        return parent::makeRequest($url, $options, $parseJson);
    }

    /**
     * Returns the error info from json.
     *
     * @param stdClass $json the json response.
     * @return array the error array with 2 keys: code and message. Should be null if no errors.
     */
    protected function fetchJsonError($json) {
        if (isset($json->error)) {
            return array(
                'code' => $json->error->code,
                'message' => $json->error->message,
            );
        } else {
            return null;
        }
    }

}
